baber/WOPTO huggingface dataset:
Patent GB-642350-A (GB)
Title: Improvements in or relating to resinous compositions
IPC: C08G63/60
Filed: 1948-03-16
Abstract: A composition capable of being completely polymerized to a thermoset copolymer against copper with little or no discolouration consists of a solvent composed of 100 parts by weight of a polymerizable liquid monomer having a CH2=C< group and a solute comprising from 5 to 300 parts of the complex ester reaction product of an acidic castor oil-a ,b  unsaturated dicarboxylic acid half ester having an average of at least two free carboxyl groups per molecule with from 1/2 to 1 1/2 molar equivalents based on the half ester of at least one compound of the group consisting of alkylene oxides and dihydric alcohols. Suitable dicarboxylic acids and anhydrides are maleic acid and anhydride, fumaric acid, citraconic anhydride and monochlormaleic anhydride.  The full acid half ester of castor oil is preferred and in the case of maleic anhydride may be prepared by heating 100 parts of castor oil with 30 parts of anhydride at a temperature of 120 DEG C. for 4 hours.  Suitable dihydric alcohols and alkylene oxides are ethylene, propylene and trimethylene glycols, 2-ethylhexanediol-1,3, diethylene glycol, 1,3-butanediol, 1,4-dihydroxy butene-2, bis-hydroxypropyl maleate, propylene oxide and butadiene monoxide. The complex esters are formed by heating the castor oil half ester and the alcohol and/or oxide up to 190-200 DEG  C. for several hours in the presence of quinhydrone while stirring and sraying with carbon dioxide.  Gellation is avoided by rapid cooling resulting in viscous oils.  The tendency to gel may be reduced by first reacting the castor oil half ester with a monohydric saturated alcohol, e.g. n-butanol, to terminate about one carboxyl group per molecule and then reacting with the dihydric alcohol or alkylene oxide.  The monomer solvent, e.g. styrene, distyrene, p-methyl styrene, vinyl acetate, methyl vinyl ketone, acrylonitrile, methyl methacrylate, ethyl acrylate, and allyl esters such as diallyl phthalate, may be copolymerized with the complex ester in the presence of a catalyst such as tert.-butyl perbenzoate, ascaridole and lauroyl and benzoyl peroxides.  The solution may be heated to 50-250 DEG  C.  In some cases, ultra-violet light may be used in combination with a catalyst with or without heating.  The compositions are useful for electrical insulation and may be cast and used for impregnating cloth.  They may be combined with asbestos fibres, glass fibres, mica powder, silica, wood flour, cotton cloth, asbestos paper and pigments and dyes. The products may be machined, sawn, drilled and sanded.ALSO:200 Parts of propylene oxide are added over a period of 3 hours to 150 parts of maleic acid in a vessel maintained at 95-105 DEG  C. After further refluxing for 2 hours, 50 more parts of propylene oxide are added while the temperature is raised to 105 DEG  C. over a two-hour period.  The product is refluxed for 4 hours, yielding bis-hydroxypropyl maleate, a light yellow oil.
Patent GB-647285-A (GB)
Title: D.c. amplifier
IPC: H03F3/40
Filed: 1948-03-16
Abstract: 647,285. Valve amplifying and modulating circuits. DU MONT LABORATORIES, Inc., A. B. March 16, 1948, No. 7880. Convention date, May 8, 1947. Drawings to Specification. [Classes 40 (v) and 40 (vi)] An amplifier for low-amplitude signals of frequency from zero to 50 kc/s. comprises push-pull input pentodes adjustable to slight unbalance by a variable tapped common resistor between their screen grids, and D.C. coupled to cathode follower valves, feeding in push-pull two balanced modulator Class B pentodes with common tuned anode circuit to the grids of which a carrier frequency is fed in parallel. The output may then be fed to a pushpull D.C. amplifier and frequency changed if necessary and amplified before passing to a detector and D.C. coupled output stage. The percentage modulation of the carrier is controlled by the variable resistor. In a modification the cathode followers preceding the modulator pentodes are omitted.
Patent GB-696094-A (GB)
Title: Improvements in or relating to cathode ray tubes
IPC: H01J29/18
Filed: 1951-04-05
Abstract: 696,094. Cathode-ray tubes. WESTINGHOUSE ELECTRIC INTERNATIONAL CO. April 5, 1951 [May 20, 1950], No. 7896/51. Drawings to Specification. Class 39(i) A cathode-ray tube, especially for television, has a thin transparent glassy layer of phosphor material on the internal side of the tube face, and a coating of a light-absorbent material is provided on the phosphor layer. The object is to obtain a screen providing a high contrast. The phosphor layer is transparent and glassy in the sense of having a non-diffusing character with respect to light rays, although the material of the layer may have an organized crystalline structure in the chemical sense. The phosphor layer may, for example, be produced by volatilizing the phosphor material and precipitating it in a vacuum. The light-absorbent layer may be carbon deposited as lampblack from a source such as an acetylene flame, or aluminium or antimony deposited by evaporation in a low pressure atmosphere.
Patent GB-749336-A (GB)
Title: Fluid meter
IPC: G01F3/22
Filed: 1954-03-18
Abstract: 749,336. Rotary meters. RAGETTE, R. March 18, 1954 [March 23, 1953], No. 7924/54. Class 110(2) [Also in Group XXIX] A fluid meter has a measuring chamber, 18, Fig. 1, formed by two end plates 6, 6<SP>1</SP> each comprising a conical central portion 7, 7<SP>1</SP> and an inwardly convex annular portion 8, 8', a disc 19 mounted in the measuring chamber for a wobbling motion and adapted to contact each of the portions 7, 7', along a generatrix thereof, a pin 24 mounted on the disc for transmitting motion to a counter 3 and a flexible diaphragm 25 arranged as a radial extension to the disc 19 to divide the measuring chamber 18 and to contact the portions 8, 8'. Each of the plates 6, 6<SP>1</SP> is formed with an inlet opening 11, Fig. 2, and an outlet opening 12 which are separated by a radial partition 26, Fig. 1, mounted in a radial slot in the disc 19 and diaphragm 25 and grooves 27, 27<SP>1</SP> in the plates 6, 6<SP>1</SP>. Fluid passes alternately through each of the openings 11 and traverses the circular path formed by the chamber 18 to the corresponding outlet opening 12 causing the disc 19 to roll on the conical portion 7, 7' and the pin 24 to move in a conical path. This pin, which engages a radial slot 29 in a disc 30 connected to the counter 3 by a shaft 31 passing through a stuffing box 32, is loaded by a spring 33 to ensure engagement of the disc 19 with the portions 7, 7<SP>1</SP> at light loads, while to ensure fluid-tight engagement the disc 19 and the plates 6, 6<SP>1</SP> are coated with or formed in a plastic or other flexible material. The diaphragm 25, which may be of plastic foil, also serves to form a joint between the plates 6, 6' and is clamped between two circular plates forming the disc 19 by the two halves of a ball pivot 20 in threaded engagement with the pin 24.
Patent GB-672414-A (GB)
Title: Improvements relating to cycle rear-wheel brakes
Inventor: HIBBERT THOMAS DE BETHAM
IPC: B62L3/02
Filed: 1950-03-30
Abstract: 672,414. Cycle brake transmissions. BIRMINGHAM SMALL ARMS CO., Ltd. Dec. 5, 1950 [March 30, 1950], No. 7931/50. Class 136(i) In a cycle rear wheel brake arrangement of the kind which has rods to transmit movement against spring action from a hand lever to a friction member engaging the wheel, the rods being connected to a lever pivoted to the underside of the bottom bracket, the lever 7 is pivoted to the bottom bracket 2 by a pin 10 on the member 7 engaging with an open ended slot 6 in a member 1 secured to the bottom bracket, the slot 6 being so disposed in relation to the resultant force on operation of the brake as to tend to maintain the engagement, and a stop 9 on the lever 7 co-operates with the lever 1 to prevent disengagement of the pin 10 and slot 6 when the brake is not operated. The lever 7 is of U-shape and consists of two side pieces 8, 8 and a bridge piece 9. The end of the lever remote form the bridge piece is swingably mounted on an anchor pin 11 secured in the side pieces of a U-shaped link 12 connected to the friction member of the rear brake. A looped end 14 of a rod 15 which is connected to the hand lever is mounted on the anchor part 11.
Patent GB-1181716-A (GB)
Title: Plate Heat Exchangers
IPC: F28F1/12
Filed: 1967-02-20
Abstract: 1,181,716. Plate heat exchangers; waste heat boilers, SVENSKA MASKINVERKEN A.B. 20 Feb., 1967 [22 Feb., 1966], No. 8031/67. Headings F4A and F4S. A heat exchanger intended particularly for generating steam or for heating water by means of hot waste gases, comprises a plurality of heat transfer units 1 mounted in parallel with each other in a casing 9, each of those units being assembled from two parallel flat plates united along their edges by edge strips 3 and held apart at a fixed distance by stay bolts (4, Fig. 5). A first fluid medium (e.g. water) is fed to the units through one or several feed pipes 5 and discharged from the units through one or several discharge pipes 7. The second fluid medium (e.g. hot gases) flows over the units 1 and over surface-increasing pin-fin elements 8 disposed in a triangular pitch pattern on the outside of said units. The casing 9 is provided at its ends with covers (15, Fig. 2) which can be opened and through which individual units 1 can be inserted and removed.
Patent GB-861732-A (GB)
Title: Improvements in or relating to refrigeration apparatus
IPC: F25D23/10
Filed: 1959-03-09
Abstract: 861,732. Refrigerators. WESTING- HOUSE ELECTRIC CORPORATION. March 9, 1959 [March 12, 1958]. No. 8047/59. Class 29 A refrigerator is fitted with a compression system so constructed that the refrigerator can be installed as shown in Fig. 1 or standing on end so that its greatest length extends vertically or in inverted position as an elevated wallmounted refrigerator. The evaporator 21 is a plate having passages 23 and disposed in a single vertical plane at the rear of the storage space, the accumulator 29 being disposed at one end and having its suction connection 30 disposed at such a level that half the volume of passages 23 lie below the level when the refrigerator is in the first position and half above. In the second position of the refrigerator, the accumulator is uppermost. Condenser 24 is mounted on a vertical rear plate 22 having an aperture 23 in which the motor compressor unit 26 is suspended by a pair of springs 34. Depending on which position the refrigerator is installed in, the springs 34 are engaged in one of three pairs of apertures 36 on three sides of aperture 23 so that the compressor unit is always right way up to ensure proper lubricant circulation. The door handles 13 are in the same place for all positions but for the second refrigerator position the doors are hinged along one long edge of the cabinet whereas for the other positions they are hinged on opposite short edges. Different cooling air channels 38 are provided for the three positions and, for the first position, a table top unit 40 is provided.
Patent GB-725714-A (GB)
Title: Collodial dispersions of chrysotile asbestos fibres
IPC: C04B20/08
Filed: 1953-03-24
Abstract: 725,714. Asbestos paper pulp. RAYBESTOS CO. March 24, 1953 [April 1, 1952], No. 8049/53. Class 96. Chrysotile asbestos paper pulp having the fibres dispersed with a fatty acid soap, e.g. having between 12 and 18 carbon atoms, e.g. sodium, potassium, lithium, ammonium triethanolamine, or morpholine soaps of oleic, stearic, linoleic, ricinoleic, eleostearic or palmitic acid, is given greater freeness, and the pulp web formed therefrom made less adherent to the wire-cloth of the paper-making machine, by adding an amount of alkali, e.g. an hydroxide of sodium, potassium, ammonium, or lithium, or a carbonate of sodium or potassium, or sodium silicate, sufficient to increase the pH value by from 0.5 to 1.5. Specification 689,692 is referred to.
Patent GB-870360-A (GB)
Title: Improvements in brooms or like devices
IPC: A46B3/06
Filed: 1959-03-09
Abstract: 870,360. Brushes. NEALE, L. H., [trading as SQUIRES BRUSH CO.]. March 9, 1960 [March 9, 1959], No. 8051/59. Class 19. Plastics bristle material 1 is so bound or fused together at one end that each tuft so formed has an enlarged head 3 so that the head nests in an enlarged section 6 of a tuft receiving bore in the stock 4 of a brush. The tuft is bonded in the bore by the subsequent application to the head of the tuft of a solidifying substance 8.
Patent GB-1248533-A (GB)
Title: Apparatus for the packing and transport of flat articles of flexible material
Inventor: NIDECHER H J
IPC: B65G51/06
Filed: 1969-02-14
Abstract: 1,248,533. Packaging films. H. J. NIDECKER. 14 Feb., 1969 [15 Feb., 1968; 22 Nov., 1968], No. 8087/69. Heading B8C. [Also in Division G2] Flat flexible articles which are easily damaged during transportation e.g. films, bank documents, transparencies, oil paintings, and in particular undeveloped X-ray films, are packaged between a pair of non-transparent flexible sheets 14 attached to and wound around the spool 7 of a cassette 4, which may then be conveyed within a pneumatic post conveyer. For loading, the cassette is located in a trough shaped depression adjacent a flat surface 2 on to which the sheets 14 are manually drawn, by sheet tongues 15, through a longitudinal slit 6 of the cassette 4. The tongue 15 of the upper sheet 14 is conveniently lug shaped whereby it engages the slit 6 and is retained thereby when the sheets 14 are wound into the cassette. In the Fig. 3 embodiment, the spool 7 is mounted, by circlip 9, within support rings 8 of the cassette 4, and the sheets 14 enclosing an X-ray film are wound within a dark room into the cassette 4, when this is displaced in the direction 13 whereby the end of the spool 7 contacts a frictional drive cone 12 of an electric motor 11. In the Fig. 5 embodiment (not shown) the motor drive is automatically commenced by displacement of the cassette 4 over a push button (18) in the base of the trough shaped depression, the drive being transmitted to a spool drive wheel (20) which projects out of the cassette (4) to frictionally engage the upper circumference of a driven mating wheel (2), and which engagement is enhanced if the base of the trough shaped depression comprises elastic material which is yieldable under pressure applied to the cassette 4. In the Fig. 6 embodiment (not shown), the spool (7) engages at one end over a cassette spigot (23) and a coil spring (25) extends through the hollow spool (7) and is attached between the spigot (23) and the opposite end of the spool (7), whereby the sheets (14) are drawn out of the cassette against the tension of the spring (25) which then acts to wind the loaded sheets (14) back into the cassette. In this embodiment, the tongues 15 are either apertured for engagement over a hook 27 on the surface 2, or are secured to the surface 2 by adhesive means during location of the sheets 14.
Patent GB-160170-A (GB)
Title: Improvements in rolling pins
IPC: A21C3/02
Filed: 1921-03-15
Abstract: 160,170. Priborslty, O. A. March 15, 1920, [Convention date]. Rolling-pins.-A rolling-pin 10 is provided with two longitudinal handles 4 which are secured, by screws 9, in recesses in end plates 5. The end plates are provided with studs 13 which project inwardly into ball races carried by thimbles 12. The thimbles are secured, by screws, in recesses in the ends of the pin.
Patent GB-546168-A (GB)
Title: Improvements in frequency stabilising circuits for frequency modulation systems
IPC: H03C3/09
Filed: 1941-06-27
Abstract: 546,168. Automatic frequency control. MARCONI'S WIRELESS TELEGRAPH CO., Ltd. June 27, 1941, No. 8140. Convention date, June 27, 1940. [Class 38 (iv)] [Also in Groups XL and XXXVI] In a frequency-modulated radio transmitter, a thermionic reactance valve 30 used for modulating the oscillation generator 4 is also used to maintain constant the mean frequency of the generator by applying a correcting voltage to a grid 36 of the reactance valve 30. Oscillations are conveyed from the generator by a lead 57 to beat with oscillations from a standard generator 50, and the resulting beats are passed through a limiting valve 58 to a circuit comprising a small condenser 72 and a resistance 74 ; a rectifier 78 shunts the resistance 74 and the resulting D.C. voltage across the resistance 74 is fed through a smoothing circuit R3, C2 to the grid 36 of the reactance valve 30. The correcting voltage rises as the beat frequency rises, owing to the effect of the circuit 72, 74, and acts on the reactance valve in such sense that the mean oscillation frequency is kept constant. The signal is applied through a transformer 40 to another grid 46 of the reactance valve to give the desired frequency modulation.
Patent GB-1268023-A (GB)
Title: Improvements in or relating to printed circuit magnetic field coils
Inventor: HOLLAND ERNEST OLIVER
IPC: H01F5/00
Filed: 1970-02-20
Abstract: 1,268,023. Electron beam magnetic deflecting apparatus; electric coils; printed circuits. MARCONI CO. Ltd. 21 Sept., 1970 [20 Feb., 1970], No. 8166/70. Headings HID, HIP and HlR. A printed circuit deflection coil for a television camera tube, especially for colour television, is formed of two half-coils and is characterized in that the joint between the halves occurs along the transverse end portions, as illustrated in Fig. 3, so that variations in overlap, as between different coils, have little effect on the magnetic fields produced by the coils. In a preferred method of manufacture, a cylindrical core of glass, ceramic, synthetic resin bonded paper or fibreglass, is coated with a conductive layer of copper which is coated with a photo-resist; one half is exposed to light through a photo-master as shown in Fig. 3, whilst the other half is shielded from the light, and the cylinder is then rotated 180 degrees for exposure of the other half. The coils are then developed and etched in known manner.
Patent GB-305398-A (GB)
Title: Improvements in rotary crusher heads or the like
IPC: B02C2/00
Filed: 1928-03-17
Abstract: 305,398. Hetu, J. A. March 17, 1928. Locking nuts. -In a self-tightening rotary crusher head, a tapered mandrel A carries a mantle C which is secured on the mandrel by a nut 3 and interengaging cam rings 5, 6, Fig. 1, of which 5 is secured to the nut 3 and 6 secured to the mantle, so that relative motion between the mantle and the mandrel in either direction of rotation tightens the mantle on to the mandrel. The mandrel A mav carry a bushing B which receives the mantle C, two threads 1, 2, of different diameters being cut on the mandrel to receive nuts 3, 13. The nut 13 is recessed at 4 to receive washers or cam rings 5, 6, which have inclined or serrated coacting faces, between which is a liner 14 of bronze. The washer 6 is. secured to the mantle C by keys 8 or by welding and a temporary pin 15, Fig. 4, is inserted through both washers. The nut is then tightened up and the pin 15 removed through a hole 10 in the nut, a larger pin 9, Fig. 5, which enters the nut and washer 5 being inserted. A washer 12 which covers the hole 10 in the nut 3 is then secured by a lock nut 13. The lower washer 6 may be dispensed with in which case the serrations are formed integral with the top of the mantle.
Patent GB-486473-A (GB)
Title: Carrier wave modulating systems and apparatus
IPC: H03C1/04
Filed: 1937-03-19
Abstract: 486,473. Valve modulating circuits. STANDARD TELEPHONES & CABLES, Ltd. March 19, 1937, No. 8201. Convention date, May 5, 1936. [Class 40 (v)] In a thermionic modulating system in which signal and carrier are applied to the control and suppressor electrodes of a pentode valve, means are provided to compensate for the passage of carrier current to the output through the inter-electrode capacity. Signals from a connecting network 1 are fed to the grid 3 of the pentode modulator valve MODI, Fig. 1, and carrier frequency from the oscillator OSC1 and amplifier AMP6 is fed to the suppressor grid 4 through a transformer 5. Carrier current transmitted to the output through the suppressor grid-anode capacity is neutralized by means of the condenser 6, the fixed elements 8, 9 of which are connected to similar ends of the primary and secondary of transformer 5. The fixed elements 8, 9 may also be connected to opposite ends of the tuned secondary of transformer 5, the mid-point being connected to earth over a condenser. Another method of compensation is shown in Fig. 2 in which the network C<1>, L, C<2>, is arranged to have a high impedance to modulation frequencies and to the modulation products, but at carrier frequency simulates an inductive reactance equal in magnitude to the capacity reactance of the inter-electrode capacity C.
Patent GB-1016628-A (GB)
Title: Improvements in and relating to feeding devices for mixing plants
IPC: E01C19/10
Filed: 1964-02-27
Abstract: 1,016,628. Endless elevators. WIBAU, WESTDEUTSCHE INDUSTRIEUND STRASSENBAUMASCHINEN G.m.b.H. Feb. 27, 1964 [March 18, 1963], No. 8237/64. Heading B8A. The housing 1 of a bucket elevator is divided into two shafts 3, 4 by a partition wall 2. Each shaft has its own charging hopper and outlet, and an electrically driven bucket conveyer runs in each of the shafts 3, 4. The elevator is suitable for feeding different materials to mixing apparatus.
Patent GB-962603-A (GB)
Title: Improvements in or relating to concrete roof structures
Inventor: WILLIAMS CHRISTOPHER JOSEPH PO
IPC: E04D13/16
Filed: 1962-03-02
Abstract: 962,603. Concrete roof coverings. EXPANDEDPLASTICS Ltd. March 1, 1963 [March 2, 1962], No. 8263/62. Heading E1V. A concrete roof is covered with a web-like structure, the interstices of which are filled with an inert powdered or granular material. The web-like structure, which may be a honeycomb paper structure, may be secured to a heat insulating layer, such as expanded polystyrene, and covered with tar-impregnated felt and asphalt.
Patent GB-254654-A (GB)
Title: Improvements in or relating to portable flame cutting machines for metal
IPC: B23K37/02
Filed: 1926-03-26
Abstract: 254,654. Hancock, L. J. March 26, 1926. Perforating and dividing by fusion. -A portable machine for flame-cutting metal is provided with an electric motor driving magnetized travelling wheels through differential gearing. The machine frame 1 carries the blowpipe 5 and is furnished with a castor wheel 3 and with a pair of travelling wheels 2 which form the poles of a magnet energized by a coil 21, so that the machine may adhere to the work in vertical or inverted positions. The wheels 2 are connected by gearing 19, 18, to a differential gearbox 16 which is driven by worm gear from a shaft 13 connected to bevel gear 12, 11, exchangeable spur gears 10, 9, and worm gears 8, 7 to an electric motor 6, the spindle of which is provided with an adjustable governor 20. The motor is clamped to the frame by a strap. The machine may be directed by a handle 22 or by engaging with a straight edge or steel templet, or may be provided with a radius bar with a magnetic centre for cutting circles. The differential gear may be locked for making straight cuts. Several pairs of magnetized wheels may be used, some of which may be idle wheels. A lifting handle 23 may also be provided. The centre of the machine may be provided with a cover.